fix get storage streaming

uploader_test.html

@@ -54,7 +54,7 @@
     // Compute SHA-256 hash of a file using jsSHA library (incremental reading)
     function computeSHA256(file) {
       return new Promise((resolve, reject) => {
-        const chunkSize = 2097152; // 2MB per chunk
+        const chunkSize = 2097152 * 10; // 2MB per chunk
         let offset = 0;
         const reader = new FileReader();
         const shaObj = new jsSHA("SHA-256", "ARRAYBUFFER");